JP2576632Y2 - Laminated glass with solar cells - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell-enclosed laminated glass having a solar cell in a laminated glass.

[0002]

2. Description of the Related Art As a glass encapsulating a solar cell, a roof glass 100 for an automobile described in Japanese Utility Model Laid-Open Publication No. 63-126151 is known as shown in FIGS. A typical example is one in which several transmission-type amorphous silicon solar cells 102 are arranged on a tempered glass 101, and a boundary portion between the solar cells 102 and the solar cells 10
The portions without 2 are all shielded by the ceramic collar 103 or the like.

[0003] Also, from the outside, it has a structure of tempered glass 101, intermediate layer 104, solar cell 102, intermediate layer 104, and film 105. Here, the intermediate layer 104
A film of ethylene vinyl acetate (EVA) or the like is used, and a transparent polyethylene terephthalate (PET) film or the like is used for the film 105 to maintain transparency.

[0004]

In the prior art, since the transmittance of the transmission type amorphous silicon solar cell 102 is about 5 to 20%, the light transmission is low and the thickness of the tempered glass 101 is small. 4 mm, the light transmittance to the solar cell 102 is reduced, the power generation efficiency per unit area of the amorphous type solar cell is as low as about 7% (initial), and the output further decreases with time. Had.

Further, the film 105 on the inner side of the vehicle is easily damaged because the film 105 is formed on the inner side of the film.
2 is likely to be damaged, and is vulnerable to impact. Further, when the glass support is attached to the inside of the vehicle, there has been a problem that the bonding reliability with the film 105 alone is low. In addition, the unevenness of the portion where the solar battery cell 102 exists and the portion where the solar battery cell 102 does not remain on the film 105, so that the reflected image inside the vehicle is distorted and the appearance is not good.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to improve light transmission and power generation efficiency, and to improve scratch resistance. An object of the present invention is to provide a solar cell-enclosed laminated glass capable of improving impact resistance, having no distortion of a reflected image, and improving the adhesion reliability of a glass support.

[0007]

In order to solve the above-mentioned problems, the present invention provides a laminated glass in which a light-transmitting window is provided at the center and a single-crystal solar cell element is sealed at the periphery.

[0008]

The translucent window improves the translucency of the laminated glass.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view of an automobile roof glass to which the solar cell-enclosed laminated glass according to the present invention is applied, and FIG. 2 is FIG.
3 is an enlarged plan view of the solar cell, FIG. 4 shows a wiring state of the solar cell, (a) is a plan view, (b) is a side view, and FIG. It is sectional drawing of an Example.

As shown in FIG. 1, a roof glass 1 for an automobile is provided with a transparent opening 2 as a light-transmitting window in the center of the laminated glass, and a single crystal silicon solar cell 3 is sealed in the periphery of the laminated glass. However, a masking portion 4 is formed in portions other than the opening 2 and the light receiving surface of the solar cell 3 for shielding.

The reason why the central portion of the laminated glass is a transparent opening 2 having transparency and the solar cell 3 can be sealed only in the peripheral portion is that the power generation efficiency per unit area is low and Instead of deteriorating amorphous silicon solar cells,
This is because the use of the single-crystal silicon solar cell 3 having high power generation efficiency per unit area makes it possible to obtain an output similar to that of the related art with a smaller light receiving area.

As shown in FIG. 2, the cross-sectional structure of the roof glass 1 for an automobile is as follows: the outer glass (thickness: 1.5 to 3.0 mm) 5; the intermediate film 6; The solar cell 3, the intermediate film 7, and the inner glass 8, and the outer glass 5, the intermediate film 6, and the transparent spacer material (thickness 3.5) are not included in the portion where the solar cell 3 is not sealed.
・ 4.5 mm) 9, the intermediate film 7, and the inner glass 8.

As shown in FIGS. 1 and 2, the solar cell 3
The surrounding masking portion 4 is formed such that the light receiving surface 11 is slightly smaller than the outer area 10 of the solar cell 3 in consideration of the arrangement error of the solar cell 3. The masking portion 4 is also formed on the upper surface of the electrode portion 12 in order to hide the wiring connection of the electrode portion 12 of the solar cell 3 shown in FIG.

The masking portion 4 is formed by applying an opaque paint such as a ceramic color to the inner surface 13 of the outer glass 5.

The outer glass 5 and the intermediate film 6 preferably have a high solar energy transmittance so as not to lower the power generation efficiency of the solar cell 3, and the outer glass 5 is a low iron composition glass of 1.5 to 2.1 mm. It is desirable that the thickness is of the order of magnitude. In addition, borosilicate glass (thickness of about 1.5 to 2.1 mm) may be used.

The intermediate film 6 is made of polyvinyl butyral (PV
B), resins such as ethylene vinyl acetate (EVA), urethane and vinyl acetate can be used.
It is desirable that the thickness be about 0 to 20 mil (0.254 to 0.508 mm).

On the other hand, the intermediate film 7 and the inner glass 8 may be made of a combination of materials for controlling the visible light transmittance and the solar energy transmittance to desirable values in order to control the energy flowing into the vehicle and secure a sense of openness in the vehicle. . For example, a transparent, colored, heat-reflective film or the like is used as the intermediate film 7 and the thickness is 15 to 30 mil (0.3
81 to 0.762 mm).

Further, as the inner glass 8, 1.5 to
A heat ray absorbing glass or a heat ray reflecting glass such as blue, gray, bronze, or green having a thickness of 3.0 mm is used. A masking portion 15 may be formed by applying an opaque paint such as a ceramic color to the inside surface 14 of the vehicle other than the transparent opening 2 at the center of the inner glass 8 so that the solar cell 3 and the wiring portion may be hidden. .

The transparent spacer material 9 is preferably substantially equal to the thickness of the solar cell 3 and substantially equal to the Young's modulus of the solar cell 3, and is preferably made of glass, polyethylene terephthalate (PET), polyvinyl butyral (PVB),
Resins such as ethylene vinyl acetate (EVA), urethane and vinyl acetate can be used. Note that the thickness tolerance of the solar cell 3 is 200 μm or less.

With the above structure, the flat single-crystal silicon solar cell 3 can be sealed in the laminated glass. The structure of the electrode take-out portion of the solar cell 3 is shown in FIGS. As shown in b), the front and back electrode portions 12 of the solar cell 3 are soldered alternately by the ribbon 16.

If the portion 17 of the ribbon 16 which is shielded by the masking portion 4 is fixed to the intermediate film 6 by heat bonding or tape bonding, the displacement of the solar cells 3 at the time of sealing is eliminated, and the arrangement of the solar cells 3 The accuracy is improved.

FIG. 5 is a sectional view of another embodiment, in which the transparent spacer material 9 constituting the opening 2 of the automobile roof glass 1 shown in FIGS. By forming the liquid crystal type light control film 20 and the intermediate film 21 which can be switched between a non-transparent state and an opaque state, a roof glass 22 for an automobile is formed of a light control function laminated glass with a solar cell. Here, the intermediate film 21 has a thickness adjusted by the amount of the liquid crystal light control film 20.

The above roof glasses 1 and 2 for automobiles
According to 2, since the entirety of the glasses 5 and 8 is joined by the intermediate films 6 and 7, high durability similar to that of ordinary laminated glass can be secured. Further, since the inner glass 8 is masked, the cover material for the interior and the like can be omitted, and the mountability is good.

Further, since the inner surface is made of glass 8, there is no unevenness, and since the wiring portion is hidden, there is no glare, and the arrangement accuracy of the solar cells 3 is high, so that the appearance is good. Further, the opening 2
Is provided, so that it has good translucency as an automobile roof glass and an open feeling.

Table 1 shows the contents improved by the roof glasses 1 and 22 for automobiles which are the embodiments of the solar cell-enclosed laminated glass according to the present invention.

[Table 1]

[0026]

As described above, according to the present invention, a translucent window having good translucency can be secured at the center of the laminated glass by employing a single-crystal solar cell element having high power generation efficiency.

[Brief description of the drawings]

FIG. 1 is a plan view of a roof glass for an automobile to which a solar cell-enclosed laminated glass according to the present invention is applied.

FIG. 2 is an enlarged cross-sectional view taken along line AA of FIG. 1;

FIG. 3 is an enlarged plan view of a solar cell.

4A is a plan view illustrating a wiring state of a solar cell, and FIG. 4B is a side view illustrating a wiring state of a solar cell.

FIG. 5 is a sectional view of another embodiment.

FIG. 6 is a plan view of the prior art.

FIG. 7 is an enlarged cross-sectional view taken along line BB of FIG. 6;

[Explanation of symbols]

1, 2 ... automobile roof glass, 2 ... opening (light-transmitting window), 3 ... solar cell (single crystalline solar cell element),
4, 15 ... masking part, 5 ... outer glass, 6, 7, 2
1 ... Interlayer, 8 ... Inner glass, 9 ... Transparent spacer material.

Claims (1)

(57) [Scope of request for utility model registration] 1. A solar cell-enclosed laminated glass comprising a laminated glass provided with a light-transmitting window in the center and a single-crystal solar cell element encapsulated in a peripheral part.